ARINC PART 7. Product Overview. Avionics Interface Technologies. N. th Street. Omaha, NE Tel: +1 Fax: +1 AIT’s ARINC test instruments can be used in test and simulation applications that are required to transmit and receive data over the ARINC avionics. Introduction. “Avionic Full-Duplex Switched Ethernet” (AFDX), designated. ARINC , is a specification for a deterministic aircraft data network bus for.

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Airbus and Rockwell Collins: The architecture adopted by AgustaWestland is centered around arknc AFDX data network developed for the latest commercial airliners. In addition, AFDX can provide quality of service and dual link redundancy. Therefore, in a network with multiple switches cascaded star topologythe total number of virtual links is nearly limitless.

Also the switch, having a VL configuration table loaded, can reject any erroneous data transmission that may otherwise swamp other branches of the network. However, total bandwidth cannot exceed the maximum available bandwidth arlnc the network.

By adding key elements from ATM to those already found in Ethernet, and constraining the specification of various options, a highly reliable full-duplex deterministic network is created providing guaranteed bandwidth and quality of service QoS. Archived from the original PDF on Webarchive template wayback links CS1 maint: A data word consists of 32 bits communicated over a twisted pair cable using the bipolar return-to-zero modulation.

Avionics Full-Duplex Switched Ethernet AFDX is a data network, patented by international aircraft manufacturer Airbus[1] for safety-critical applications that utilizes dedicated bandwidth while providing deterministic quality of service QoS.

AgustaWestland asserts its arincc in the cockpit”. This type of network can significantly reduce wire runs and, thus, the overall weight of the aircraft. There can be one or more receiving end systems connected within each virtual link.

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Innovating together for the A XWB”. Each VL is frozen in specification to ensure that the network has a designed zrinc traffic, hence determinism. Also sub-virtual links do not provide guaranteed bandwidth or latency due to the buffering, but AFDX specifies that latency is measured from the traffic regulator function anyway. This ADN operates without the use of a bus controller thereby increasing the reliability of the network architecture.

Further a redundant pair of networks is used to improve the system integrity although a virtual link may be configured to use one or the other network only. zrinc


Each virtual link is allocated dedicated bandwidth [sum of all VL bandwidth allocation gap BAG rates x MTU] with the aronc amount of bandwidth defined by the system integrator. The switches are designed to route an incoming frame from one, and only one, end system to a predetermined set of end systems. Sub-virtual links are assigned to a particular virtual link.

In one abstraction, it is possible to visualise the VLs as an ARINC style network each with one source and one or more destinations. A similar implementation [ clarify ] of deterministic Ethernet is used on the Boeing Atinc.

Avionics Full-Duplex Switched Ethernet

The network is designed in such a way that all critical qrinc is prioritized using QoS policies so delivery, latency, and jitter are all guaranteed to be within set parameters. AFDX was designed as the next-generation aircraft data network.

Office for Harmonization in the Internal Market. The switch must also be non-blocking at the data rates that are specified by the system integrator, and in practice this may mean that the switch shall have a switching capacity that is the sum of all of its physical ports.


AFDX extends standard Ethernet to provide high data integrity and deterministic timing. Ethernet family of local area network technologies. By using this site, you agree to the Terms of Use and Privacy Policy. Archived copy as title All Wikipedia articles needing clarification Wikipedia articles needing clarification from September AFDX is a worldwide registered trademark by Airbus.

Avionics Full-Duplex Switched Ethernet – Wikipedia

Bi-directional communications rainc therefore require the specification of a complementary VL. It specifies interoperable functional elements at the following OSI reference model layers:. Additionally, there can be sub-virtual links sub-VLs that are designed to carry less critical data.

There is no specified limit to the number of virtual links that can be handled by each end system, although this will be determined by the BAG rates and maximum frame size specified for each VL versus the Ethernet data rate. AFDX was developed by Airbus Industries for the A, [3] initially to address real-time issues for flight-by-wire system development.

The virtual link ID is a bit unsigned integer value that follows a constant bit field. Through the use of twisted pair or fiber optic cables, full-duplex Ethernet uses two separate pairs or strands for transmitting and receiving the data.